Long-term debt (Tables)

12 Months Ended

Dec. 31, 2025

Disclosure of detailed information about borrowings [line items]

Disclosure of borrowings [Table Text Block]

		Dec. 31, 2025			Dec. 31, 2024
Current:
Senior unsecured notes (a)	$	472.1		$	-

Non-current:
Senior unsecured notes (a)		538.8			1,111.1
Senior secured revolving credit facilities (b)		(2.3	)		(3.6	)
		536.5			1,107.5
Total Long-term debt	$	1,008.6		$	1,107.5

Senior unsecured notes [Member]

Disclosure of detailed information about borrowings [line items]

Disclosure of detailed information about borrowings [Table Text Block]

Balance, January 1, 2024	$	1,190.6
Repurchases		(82.6	)
Write-down of unamortized transaction costs		0.6
Accretion of transaction costs and premiums		2.5
Balance, December 31, 2024	$	1,111.1
Repurchases		(102.5	)
Write-down of unamortized transaction costs		0.2
Accretion of transaction costs and premiums		2.1
Balance, December 31, 2025	$	1,010.9

Senior secured revolving credit facilities [Member]

Disclosure of detailed information about borrowings [line items]

Disclosure of borrowings [Table Text Block]

Balance, January 1, 2024¹	$	96.9
Repayments		(100.0	)
Accretion of transaction costs		2.0
Transaction costs		(2.5	)
Balance, December 31, 2024¹	$	(3.6	)
Accretion of transaction costs		1.3
Balance, December 31, 2025¹	$	(2.3	)